That's the whole point. Those "restful API backend services" are not really REST-ful. The essay, "How Did Rest Come To Mean The Opposite of REST"[0], explains this better than I ever could in a HN post. Maybe we should stop growing these Data-APIs (returning JSON) and switch back to Hypermedia-APIs (returning HTML).
[0] https://htmx.org/essays/how-did-rest-come-to-mean-the-opposi...